She would then tell us to work out x. That is easy. 180-60=x
But then she tells us to give a reason and she says the reason will be: adjacent angles on a straight line. What I don't get, are the reasons for co interior and corresponding angles.

But give us the value of C D and B and say work out A. She would then say. Give a reason for why you say that. Also, how would I work that out? I know the answer in my head, but need to show working out.
Help would be appreciated!

Thanks. (Happy)

June 20th 2011, 02:37 PM

bjhopper

Re: Co interior, alternate and corresponding angles.

Hi jesseE fantasma,
Google parallel lines and transversals for angle definitions and properties.If you can't find a proof for a theorem like alternate interior angles are equal repost and I will give you one.In geometry you learn theorems and learned you can use them without proof to solve a problem